彼が彼女と別れなければならない日がついにやってきた。

The day came at last when he had to part from her.

彼(かれ)が彼女(かのじょ)と別(わか)れなければならない日(ひ)がついにやってきた。

Kare ga kanojo to wakarenakerebanaranai hi ga tsuini yattekita.

彼 (かれ)

he; him; his; boyfriend

が (が)

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

彼女 (かのじょ)

she; her; her; girlfriend; sweetheart

と (と)

if; when; and; with; particle used for quoting (with speech, thoughts, etc.); quoting particle; promoted pawn; indicates question (sentence end)

別れる (わかれる)

to be divided; to part from; to separate (usu. for people); to bid farewell

日 (ひ)

day; days; sun; sunshine; sunlight; case (esp. unfortunate); event

遂に (ついに)

finally; at last; in the end

やって来る (やってくる)

to come along; to come around; to turn up; to arrive at the present; to get where one is; to have been doing something (for a period of time)

Readings: ヒ、かれ、かの、か.の

Meanings: he, that, the

Readings: ジョ、ニョ、ニョウ、おんな、め

Meanings: woman, female

Readings: ベツ、わか.れる、わ.ける

Meanings: separate, branch off, diverge, fork, another, extra, specially

Readings: ニチ、ジツ、ひ、 -び、 -か

Meanings: day, sun, Japan, counter for days